#include <r_lib.h>
#include "fixedint.h"
#include "sc.h"

/*
Input:
  s[0]+256*s[1]+...+256^63*s[63] = s

Output:
  s[0]+256*s[1]+...+256^31*s[31] = s mod l
  where l = 2^252 + 27742317777372353535851937790883648493.
  Overwrites s in place.
*/

void sc_reduce(unsigned char *s) {
	st64 s0 = 2097151 & r_read_le24 (s);
	st64 s1 = 2097151 & (r_read_le32 (s + 2) >> 5);
	st64 s2 = 2097151 & (r_read_le24 (s + 5) >> 2);
	st64 s3 = 2097151 & (r_read_le32 (s + 7) >> 7);
	st64 s4 = 2097151 & (r_read_le32 (s + 10) >> 4);
	st64 s5 = 2097151 & (r_read_le24 (s + 13) >> 1);
	st64 s6 = 2097151 & (r_read_le32 (s + 15) >> 6);
	st64 s7 = 2097151 & (r_read_le24 (s + 18) >> 3);
	st64 s8 = 2097151 & r_read_le24 (s + 21);
	st64 s9 = 2097151 & (r_read_le32 (s + 23) >> 5);
	st64 s10 = 2097151 & (r_read_le24 (s + 26) >> 2);
	st64 s11 = 2097151 & (r_read_le32 (s + 28) >> 7);
	st64 s12 = 2097151 & (r_read_le32 (s + 31) >> 4);
	st64 s13 = 2097151 & (r_read_le24 (s + 34) >> 1);
	st64 s14 = 2097151 & (r_read_le32 (s + 36) >> 6);
	st64 s15 = 2097151 & (r_read_le24 (s + 39) >> 3);
	st64 s16 = 2097151 & r_read_le24 (s + 42);
	st64 s17 = 2097151 & (r_read_le32 (s + 44) >> 5);
	st64 s18 = 2097151 & (r_read_le24 (s + 47) >> 2);
	st64 s19 = 2097151 & (r_read_le32 (s + 49) >> 7);
	st64 s20 = 2097151 & (r_read_le32 (s + 52) >> 4);
	st64 s21 = 2097151 & (r_read_le24 (s + 55) >> 1);
	st64 s22 = 2097151 & (r_read_le32 (s + 57) >> 6);
	st64 s23 = (r_read_le32 (s + 60) >> 3);
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;
	st64 carry10;
	st64 carry11;
	st64 carry12;
	st64 carry13;
	st64 carry14;
	st64 carry15;
	st64 carry16;

	s11 += s23 * 666643;
	s12 += s23 * 470296;
	s13 += s23 * 654183;
	s14 -= s23 * 997805;
	s15 += s23 * 136657;
	s16 -= s23 * 683901;
	s23 = 0;
	s10 += s22 * 666643;
	s11 += s22 * 470296;
	s12 += s22 * 654183;
	s13 -= s22 * 997805;
	s14 += s22 * 136657;
	s15 -= s22 * 683901;
	s22 = 0;
	s9 += s21 * 666643;
	s10 += s21 * 470296;
	s11 += s21 * 654183;
	s12 -= s21 * 997805;
	s13 += s21 * 136657;
	s14 -= s21 * 683901;
	s21 = 0;
	s8 += s20 * 666643;
	s9 += s20 * 470296;
	s10 += s20 * 654183;
	s11 -= s20 * 997805;
	s12 += s20 * 136657;
	s13 -= s20 * 683901;
	s20 = 0;
	s7 += s19 * 666643;
	s8 += s19 * 470296;
	s9 += s19 * 654183;
	s10 -= s19 * 997805;
	s11 += s19 * 136657;
	s12 -= s19 * 683901;
	s19 = 0;
	s6 += s18 * 666643;
	s7 += s18 * 470296;
	s8 += s18 * 654183;
	s9 -= s18 * 997805;
	s10 += s18 * 136657;
	s11 -= s18 * 683901;
	s18 = 0;
	carry6 = (s6 + (1 << 20)) >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry8 = (s8 + (1 << 20)) >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry10 = (s10 + (1 << 20)) >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry12 = (s12 + (1 << 20)) >> 21;
	s13 += carry12;
	s12 -= carry12 << 21;
	carry14 = (s14 + (1 << 20)) >> 21;
	s15 += carry14;
	s14 -= carry14 << 21;
	carry16 = (s16 + (1 << 20)) >> 21;
	s17 += carry16;
	s16 -= carry16 << 21;
	carry7 = (s7 + (1 << 20)) >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry9 = (s9 + (1 << 20)) >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry11 = (s11 + (1 << 20)) >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	carry13 = (s13 + (1 << 20)) >> 21;
	s14 += carry13;
	s13 -= carry13 << 21;
	carry15 = (s15 + (1 << 20)) >> 21;
	s16 += carry15;
	s15 -= carry15 << 21;
	s5 += s17 * 666643;
	s6 += s17 * 470296;
	s7 += s17 * 654183;
	s8 -= s17 * 997805;
	s9 += s17 * 136657;
	s10 -= s17 * 683901;
	s17 = 0;
	s4 += s16 * 666643;
	s5 += s16 * 470296;
	s6 += s16 * 654183;
	s7 -= s16 * 997805;
	s8 += s16 * 136657;
	s9 -= s16 * 683901;
	s16 = 0;
	s3 += s15 * 666643;
	s4 += s15 * 470296;
	s5 += s15 * 654183;
	s6 -= s15 * 997805;
	s7 += s15 * 136657;
	s8 -= s15 * 683901;
	s15 = 0;
	s2 += s14 * 666643;
	s3 += s14 * 470296;
	s4 += s14 * 654183;
	s5 -= s14 * 997805;
	s6 += s14 * 136657;
	s7 -= s14 * 683901;
	s14 = 0;
	s1 += s13 * 666643;
	s2 += s13 * 470296;
	s3 += s13 * 654183;
	s4 -= s13 * 997805;
	s5 += s13 * 136657;
	s6 -= s13 * 683901;
	s13 = 0;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = (s0 + (1 << 20)) >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry2 = (s2 + (1 << 20)) >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry4 = (s4 + (1 << 20)) >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry6 = (s6 + (1 << 20)) >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry8 = (s8 + (1 << 20)) >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry10 = (s10 + (1 << 20)) >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry1 = (s1 + (1 << 20)) >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry3 = (s3 + (1 << 20)) >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry5 = (s5 + (1 << 20)) >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry7 = (s7 + (1 << 20)) >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry9 = (s9 + (1 << 20)) >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry11 = (s11 + (1 << 20)) >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = s0 >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry1 = s1 >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry2 = s2 >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry3 = s3 >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry4 = s4 >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry5 = s5 >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry6 = s6 >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry7 = s7 >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry8 = s8 >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry9 = s9 >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry10 = s10 >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry11 = s11 >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = s0 >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry1 = s1 >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry2 = s2 >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry3 = s3 >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry4 = s4 >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry5 = s5 >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry6 = s6 >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry7 = s7 >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry8 = s8 >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry9 = s9 >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry10 = s10 >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;

	s[0] = (unsigned char)(s0 >> 0);
	s[1] = (unsigned char)(s0 >> 8);
	s[2] = (unsigned char)((s0 >> 16) | (s1 << 5));
	s[3] = (unsigned char)(s1 >> 3);
	s[4] = (unsigned char)(s1 >> 11);
	s[5] = (unsigned char)((s1 >> 19) | (s2 << 2));
	s[6] = (unsigned char)(s2 >> 6);
	s[7] = (unsigned char)((s2 >> 14) | (s3 << 7));
	s[8] = (unsigned char)(s3 >> 1);
	s[9] = (unsigned char)(s3 >> 9);
	s[10] = (unsigned char)((s3 >> 17) | (s4 << 4));
	s[11] = (unsigned char)(s4 >> 4);
	s[12] = (unsigned char)(s4 >> 12);
	s[13] = (unsigned char)((s4 >> 20) | (s5 << 1));
	s[14] = (unsigned char)(s5 >> 7);
	s[15] = (unsigned char)((s5 >> 15) | (s6 << 6));
	s[16] = (unsigned char)(s6 >> 2);
	s[17] = (unsigned char)(s6 >> 10);
	s[18] = (unsigned char)((s6 >> 18) | (s7 << 3));
	s[19] = (unsigned char)(s7 >> 5);
	s[20] = (unsigned char)(s7 >> 13);
	s[21] = (unsigned char)(s8 >> 0);
	s[22] = (unsigned char)(s8 >> 8);
	s[23] = (unsigned char)((s8 >> 16) | (s9 << 5));
	s[24] = (unsigned char)(s9 >> 3);
	s[25] = (unsigned char)(s9 >> 11);
	s[26] = (unsigned char)((s9 >> 19) | (s10 << 2));
	s[27] = (unsigned char)(s10 >> 6);
	s[28] = (unsigned char)((s10 >> 14) | (s11 << 7));
	s[29] = (unsigned char)(s11 >> 1);
	s[30] = (unsigned char)(s11 >> 9);
	s[31] = (unsigned char)(s11 >> 17);
}

/*
Input:
  a[0]+256*a[1]+...+256^31*a[31] = a
  b[0]+256*b[1]+...+256^31*b[31] = b
  c[0]+256*c[1]+...+256^31*c[31] = c

Output:
  s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l
  where l = 2^252 + 27742317777372353535851937790883648493.
*/

void sc_muladd(unsigned char *s, const unsigned char *a, const unsigned char *b, const unsigned char *c) {
	st64 a0 = 2097151 & r_read_le24 (a);
	st64 a1 = 2097151 & (r_read_le32 (a + 2) >> 5);
	st64 a2 = 2097151 & (r_read_le24 (a + 5) >> 2);
	st64 a3 = 2097151 & (r_read_le32 (a + 7) >> 7);
	st64 a4 = 2097151 & (r_read_le32 (a + 10) >> 4);
	st64 a5 = 2097151 & (r_read_le24 (a + 13) >> 1);
	st64 a6 = 2097151 & (r_read_le32 (a + 15) >> 6);
	st64 a7 = 2097151 & (r_read_le24 (a + 18) >> 3);
	st64 a8 = 2097151 & r_read_le24 (a + 21);
	st64 a9 = 2097151 & (r_read_le32 (a + 23) >> 5);
	st64 a10 = 2097151 & (r_read_le24 (a + 26) >> 2);
	st64 a11 = (r_read_le32 (a + 28) >> 7);
	st64 b0 = 2097151 & r_read_le24 (b);
	st64 b1 = 2097151 & (r_read_le32 (b + 2) >> 5);
	st64 b2 = 2097151 & (r_read_le24 (b + 5) >> 2);
	st64 b3 = 2097151 & (r_read_le32 (b + 7) >> 7);
	st64 b4 = 2097151 & (r_read_le32 (b + 10) >> 4);
	st64 b5 = 2097151 & (r_read_le24 (b + 13) >> 1);
	st64 b6 = 2097151 & (r_read_le32 (b + 15) >> 6);
	st64 b7 = 2097151 & (r_read_le24 (b + 18) >> 3);
	st64 b8 = 2097151 & r_read_le24 (b + 21);
	st64 b9 = 2097151 & (r_read_le32 (b + 23) >> 5);
	st64 b10 = 2097151 & (r_read_le24 (b + 26) >> 2);
	st64 b11 = (r_read_le32 (b + 28) >> 7);
	st64 c0 = 2097151 & r_read_le24 (c);
	st64 c1 = 2097151 & (r_read_le32 (c + 2) >> 5);
	st64 c2 = 2097151 & (r_read_le24 (c + 5) >> 2);
	st64 c3 = 2097151 & (r_read_le32 (c + 7) >> 7);
	st64 c4 = 2097151 & (r_read_le32 (c + 10) >> 4);
	st64 c5 = 2097151 & (r_read_le24 (c + 13) >> 1);
	st64 c6 = 2097151 & (r_read_le32 (c + 15) >> 6);
	st64 c7 = 2097151 & (r_read_le24 (c + 18) >> 3);
	st64 c8 = 2097151 & r_read_le24 (c + 21);
	st64 c9 = 2097151 & (r_read_le32 (c + 23) >> 5);
	st64 c10 = 2097151 & (r_read_le24 (c + 26) >> 2);
	st64 c11 = (r_read_le32 (c + 28) >> 7);
	st64 s0;
	st64 s1;
	st64 s2;
	st64 s3;
	st64 s4;
	st64 s5;
	st64 s6;
	st64 s7;
	st64 s8;
	st64 s9;
	st64 s10;
	st64 s11;
	st64 s12;
	st64 s13;
	st64 s14;
	st64 s15;
	st64 s16;
	st64 s17;
	st64 s18;
	st64 s19;
	st64 s20;
	st64 s21;
	st64 s22;
	st64 s23;
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;
	st64 carry10;
	st64 carry11;
	st64 carry12;
	st64 carry13;
	st64 carry14;
	st64 carry15;
	st64 carry16;
	st64 carry17;
	st64 carry18;
	st64 carry19;
	st64 carry20;
	st64 carry21;
	st64 carry22;

	s0 = c0 + a0 * b0;
	s1 = c1 + a0 * b1 + a1 * b0;
	s2 = c2 + a0 * b2 + a1 * b1 + a2 * b0;
	s3 = c3 + a0 * b3 + a1 * b2 + a2 * b1 + a3 * b0;
	s4 = c4 + a0 * b4 + a1 * b3 + a2 * b2 + a3 * b1 + a4 * b0;
	s5 = c5 + a0 * b5 + a1 * b4 + a2 * b3 + a3 * b2 + a4 * b1 + a5 * b0;
	s6 = c6 + a0 * b6 + a1 * b5 + a2 * b4 + a3 * b3 + a4 * b2 + a5 * b1 + a6 * b0;
	s7 = c7 + a0 * b7 + a1 * b6 + a2 * b5 + a3 * b4 + a4 * b3 + a5 * b2 + a6 * b1 + a7 * b0;
	s8 = c8 + a0 * b8 + a1 * b7 + a2 * b6 + a3 * b5 + a4 * b4 + a5 * b3 + a6 * b2 + a7 * b1 + a8 * b0;
	s9 = c9 + a0 * b9 + a1 * b8 + a2 * b7 + a3 * b6 + a4 * b5 + a5 * b4 + a6 * b3 + a7 * b2 + a8 * b1 + a9 * b0;
	s10 = c10 + a0 * b10 + a1 * b9 + a2 * b8 + a3 * b7 + a4 * b6 + a5 * b5 + a6 * b4 + a7 * b3 + a8 * b2 + a9 * b1 + a10 * b0;
	s11 = c11 + a0 * b11 + a1 * b10 + a2 * b9 + a3 * b8 + a4 * b7 + a5 * b6 + a6 * b5 + a7 * b4 + a8 * b3 + a9 * b2 + a10 * b1 + a11 * b0;
	s12 = a1 * b11 + a2 * b10 + a3 * b9 + a4 * b8 + a5 * b7 + a6 * b6 + a7 * b5 + a8 * b4 + a9 * b3 + a10 * b2 + a11 * b1;
	s13 = a2 * b11 + a3 * b10 + a4 * b9 + a5 * b8 + a6 * b7 + a7 * b6 + a8 * b5 + a9 * b4 + a10 * b3 + a11 * b2;
	s14 = a3 * b11 + a4 * b10 + a5 * b9 + a6 * b8 + a7 * b7 + a8 * b6 + a9 * b5 + a10 * b4 + a11 * b3;
	s15 = a4 * b11 + a5 * b10 + a6 * b9 + a7 * b8 + a8 * b7 + a9 * b6 + a10 * b5 + a11 * b4;
	s16 = a5 * b11 + a6 * b10 + a7 * b9 + a8 * b8 + a9 * b7 + a10 * b6 + a11 * b5;
	s17 = a6 * b11 + a7 * b10 + a8 * b9 + a9 * b8 + a10 * b7 + a11 * b6;
	s18 = a7 * b11 + a8 * b10 + a9 * b9 + a10 * b8 + a11 * b7;
	s19 = a8 * b11 + a9 * b10 + a10 * b9 + a11 * b8;
	s20 = a9 * b11 + a10 * b10 + a11 * b9;
	s21 = a10 * b11 + a11 * b10;
	s22 = a11 * b11;
	s23 = 0;
	carry0 = (s0 + (1 << 20)) >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry2 = (s2 + (1 << 20)) >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry4 = (s4 + (1 << 20)) >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry6 = (s6 + (1 << 20)) >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry8 = (s8 + (1 << 20)) >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry10 = (s10 + (1 << 20)) >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry12 = (s12 + (1 << 20)) >> 21;
	s13 += carry12;
	s12 -= carry12 << 21;
	carry14 = (s14 + (1 << 20)) >> 21;
	s15 += carry14;
	s14 -= carry14 << 21;
	carry16 = (s16 + (1 << 20)) >> 21;
	s17 += carry16;
	s16 -= carry16 << 21;
	carry18 = (s18 + (1 << 20)) >> 21;
	s19 += carry18;
	s18 -= carry18 << 21;
	carry20 = (s20 + (1 << 20)) >> 21;
	s21 += carry20;
	s20 -= carry20 << 21;
	carry22 = (s22 + (1 << 20)) >> 21;
	s23 += carry22;
	s22 -= carry22 << 21;
	carry1 = (s1 + (1 << 20)) >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry3 = (s3 + (1 << 20)) >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry5 = (s5 + (1 << 20)) >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry7 = (s7 + (1 << 20)) >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry9 = (s9 + (1 << 20)) >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry11 = (s11 + (1 << 20)) >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	carry13 = (s13 + (1 << 20)) >> 21;
	s14 += carry13;
	s13 -= carry13 << 21;
	carry15 = (s15 + (1 << 20)) >> 21;
	s16 += carry15;
	s15 -= carry15 << 21;
	carry17 = (s17 + (1 << 20)) >> 21;
	s18 += carry17;
	s17 -= carry17 << 21;
	carry19 = (s19 + (1 << 20)) >> 21;
	s20 += carry19;
	s19 -= carry19 << 21;
	carry21 = (s21 + (1 << 20)) >> 21;
	s22 += carry21;
	s21 -= carry21 << 21;
	s11 += s23 * 666643;
	s12 += s23 * 470296;
	s13 += s23 * 654183;
	s14 -= s23 * 997805;
	s15 += s23 * 136657;
	s16 -= s23 * 683901;
	s23 = 0;
	s10 += s22 * 666643;
	s11 += s22 * 470296;
	s12 += s22 * 654183;
	s13 -= s22 * 997805;
	s14 += s22 * 136657;
	s15 -= s22 * 683901;
	s22 = 0;
	s9 += s21 * 666643;
	s10 += s21 * 470296;
	s11 += s21 * 654183;
	s12 -= s21 * 997805;
	s13 += s21 * 136657;
	s14 -= s21 * 683901;
	s21 = 0;
	s8 += s20 * 666643;
	s9 += s20 * 470296;
	s10 += s20 * 654183;
	s11 -= s20 * 997805;
	s12 += s20 * 136657;
	s13 -= s20 * 683901;
	s20 = 0;
	s7 += s19 * 666643;
	s8 += s19 * 470296;
	s9 += s19 * 654183;
	s10 -= s19 * 997805;
	s11 += s19 * 136657;
	s12 -= s19 * 683901;
	s19 = 0;
	s6 += s18 * 666643;
	s7 += s18 * 470296;
	s8 += s18 * 654183;
	s9 -= s18 * 997805;
	s10 += s18 * 136657;
	s11 -= s18 * 683901;
	s18 = 0;
	carry6 = (s6 + (1 << 20)) >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry8 = (s8 + (1 << 20)) >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry10 = (s10 + (1 << 20)) >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry12 = (s12 + (1 << 20)) >> 21;
	s13 += carry12;
	s12 -= carry12 << 21;
	carry14 = (s14 + (1 << 20)) >> 21;
	s15 += carry14;
	s14 -= carry14 << 21;
	carry16 = (s16 + (1 << 20)) >> 21;
	s17 += carry16;
	s16 -= carry16 << 21;
	carry7 = (s7 + (1 << 20)) >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry9 = (s9 + (1 << 20)) >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry11 = (s11 + (1 << 20)) >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	carry13 = (s13 + (1 << 20)) >> 21;
	s14 += carry13;
	s13 -= carry13 << 21;
	carry15 = (s15 + (1 << 20)) >> 21;
	s16 += carry15;
	s15 -= carry15 << 21;
	s5 += s17 * 666643;
	s6 += s17 * 470296;
	s7 += s17 * 654183;
	s8 -= s17 * 997805;
	s9 += s17 * 136657;
	s10 -= s17 * 683901;
	s17 = 0;
	s4 += s16 * 666643;
	s5 += s16 * 470296;
	s6 += s16 * 654183;
	s7 -= s16 * 997805;
	s8 += s16 * 136657;
	s9 -= s16 * 683901;
	s16 = 0;
	s3 += s15 * 666643;
	s4 += s15 * 470296;
	s5 += s15 * 654183;
	s6 -= s15 * 997805;
	s7 += s15 * 136657;
	s8 -= s15 * 683901;
	s15 = 0;
	s2 += s14 * 666643;
	s3 += s14 * 470296;
	s4 += s14 * 654183;
	s5 -= s14 * 997805;
	s6 += s14 * 136657;
	s7 -= s14 * 683901;
	s14 = 0;
	s1 += s13 * 666643;
	s2 += s13 * 470296;
	s3 += s13 * 654183;
	s4 -= s13 * 997805;
	s5 += s13 * 136657;
	s6 -= s13 * 683901;
	s13 = 0;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = (s0 + (1 << 20)) >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry2 = (s2 + (1 << 20)) >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry4 = (s4 + (1 << 20)) >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry6 = (s6 + (1 << 20)) >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry8 = (s8 + (1 << 20)) >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry10 = (s10 + (1 << 20)) >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry1 = (s1 + (1 << 20)) >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry3 = (s3 + (1 << 20)) >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry5 = (s5 + (1 << 20)) >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry7 = (s7 + (1 << 20)) >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry9 = (s9 + (1 << 20)) >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry11 = (s11 + (1 << 20)) >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = s0 >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry1 = s1 >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry2 = s2 >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry3 = s3 >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry4 = s4 >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry5 = s5 >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry6 = s6 >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry7 = s7 >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry8 = s8 >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry9 = s9 >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry10 = s10 >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;
	carry11 = s11 >> 21;
	s12 += carry11;
	s11 -= carry11 << 21;
	s0 += s12 * 666643;
	s1 += s12 * 470296;
	s2 += s12 * 654183;
	s3 -= s12 * 997805;
	s4 += s12 * 136657;
	s5 -= s12 * 683901;
	s12 = 0;
	carry0 = s0 >> 21;
	s1 += carry0;
	s0 -= carry0 << 21;
	carry1 = s1 >> 21;
	s2 += carry1;
	s1 -= carry1 << 21;
	carry2 = s2 >> 21;
	s3 += carry2;
	s2 -= carry2 << 21;
	carry3 = s3 >> 21;
	s4 += carry3;
	s3 -= carry3 << 21;
	carry4 = s4 >> 21;
	s5 += carry4;
	s4 -= carry4 << 21;
	carry5 = s5 >> 21;
	s6 += carry5;
	s5 -= carry5 << 21;
	carry6 = s6 >> 21;
	s7 += carry6;
	s6 -= carry6 << 21;
	carry7 = s7 >> 21;
	s8 += carry7;
	s7 -= carry7 << 21;
	carry8 = s8 >> 21;
	s9 += carry8;
	s8 -= carry8 << 21;
	carry9 = s9 >> 21;
	s10 += carry9;
	s9 -= carry9 << 21;
	carry10 = s10 >> 21;
	s11 += carry10;
	s10 -= carry10 << 21;

	s[0] = (unsigned char)(s0 >> 0);
	s[1] = (unsigned char)(s0 >> 8);
	s[2] = (unsigned char)((s0 >> 16) | (s1 << 5));
	s[3] = (unsigned char)(s1 >> 3);
	s[4] = (unsigned char)(s1 >> 11);
	s[5] = (unsigned char)((s1 >> 19) | (s2 << 2));
	s[6] = (unsigned char)(s2 >> 6);
	s[7] = (unsigned char)((s2 >> 14) | (s3 << 7));
	s[8] = (unsigned char)(s3 >> 1);
	s[9] = (unsigned char)(s3 >> 9);
	s[10] = (unsigned char)((s3 >> 17) | (s4 << 4));
	s[11] = (unsigned char)(s4 >> 4);
	s[12] = (unsigned char)(s4 >> 12);
	s[13] = (unsigned char)((s4 >> 20) | (s5 << 1));
	s[14] = (unsigned char)(s5 >> 7);
	s[15] = (unsigned char)((s5 >> 15) | (s6 << 6));
	s[16] = (unsigned char)(s6 >> 2);
	s[17] = (unsigned char)(s6 >> 10);
	s[18] = (unsigned char)((s6 >> 18) | (s7 << 3));
	s[19] = (unsigned char)(s7 >> 5);
	s[20] = (unsigned char)(s7 >> 13);
	s[21] = (unsigned char)(s8 >> 0);
	s[22] = (unsigned char)(s8 >> 8);
	s[23] = (unsigned char)((s8 >> 16) | (s9 << 5));
	s[24] = (unsigned char)(s9 >> 3);
	s[25] = (unsigned char)(s9 >> 11);
	s[26] = (unsigned char)((s9 >> 19) | (s10 << 2));
	s[27] = (unsigned char)(s10 >> 6);
	s[28] = (unsigned char)((s10 >> 14) | (s11 << 7));
	s[29] = (unsigned char)(s11 >> 1);
	s[30] = (unsigned char)(s11 >> 9);
	s[31] = (unsigned char)(s11 >> 17);
}
